package com.example.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

/**
 * @author chensixiang chensixiang1234@gmail.com
 */
@Service
public class PaymentService {
    public String paymentInfo_OK(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "paymentInfo_OK, id" + id + "\t" + "😊";
    }

    @HystrixCommand(fallbackMethod = "paymentInfo_Timeout_Handler", commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")
    })
    public String paymentInfo_Timeout(Integer id) {
        // int i = 10/0;
        try {
            TimeUnit.MILLISECONDS.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：" +
                Thread.currentThread().getName()
                + "paymentInfo_Timeout, id" + id + "\t" + "😊" + "耗时" + "秒钟";
    }

    public String paymentInfo_Timeout_Handler(Integer id) {
        return "线程池：" +
                Thread.currentThread().getName()
                + "paymentInfo_Timeout, id" + id + "\t" + "🤢";
    }

    @HystrixCommand(
            fallbackMethod = "paymentCircuitBreaker_fallback",
            commandProperties = {
                    // 是否开启断路器
                    @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),
                    // 请求次数 熔断触发的最小个数/10s
                    @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),
                    // 时间窗口期，熔断多少秒后尝试请求
                    @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"),
                    // 失败率达到多少后跳闸，失败率达到所少后熔断
                    @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60")
            }
    )
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException();
        }
        String uuid = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + "\t" + "调用成功，流水号" + uuid;
    }

    //服务熔断
    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能为负数，请稍后再试🤢";
    }
}
